ἁλοφύλαξ

From LSJ

ἀναπηδῆσαι πρὸς τὸν πάππον → jumped up on his grandfather's knees, sprang up into his grandfather's lap

Source

Spanish (DGE)

-ακος, ὁ vigilante de la costa, PHib.275.14 (I/II a.C.).